Bobbin.



No. 777,000. PATENTED DB0. 0, 1904.

P. CLARK. l

BOBBIN.

APPLIOATION FILED 00T. 20, 1903.

No. M0021..

Patented December 6, 1904.

PATENT Urraca,

FRANCIS CLARK, 0F PHILADELPHIA, PENNSYLVANIA.

EOBBIN.

SPECIFICATION forming part of Letters Patent No. 777,000, dated December6, 1904.

Application filed October 20, 1903. Serial No. 177,761. (No modali? Toall, whom t may concern,-

Beit known that l, FRANCIS CLARK, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented a new and useful Bobbin, oi' which the'following is a speciiication.

rlhis invention relates to certain improvements in bobbins, and has forits principal object to provide a means for protecting and strengtheningthe end or' shuttle-bobbins, particularly with a view of utilizingbobbins that have become cracked or otherwise injured and in which theyarn is likely to catch during the travel of the shuttle across theshed.

rl`he majority of bobbins are formed of comparatively thin wood and inmany cases become cracked or broken, especially at their outer ends, andduring the process oi' weaving the yarn or thread is liable to catch inone of the cracks and break, rendering it necessary to stop the loom andpick back to the place where the thread broke. This not only results inloss of time and material, but in many cases will cause defects in thefabric. 1t is usual, therefore, to immediately discard cracked or brokenbobbins, and this in a large mill is a source of considerable expense.

ln carrying out the present invention the weaver is provided with a toolor attachment that may be quickly applied to a cracked or broken bobbinin such manner as to prevent the thread from catching in the cracks andat the saine time prevent further cracking or breaking of the bobbinwhile in the shuttle. The device may be applied to bobbins in goodcondition, if desired, in order to protect the same from injury; but itis intended principally as a convenience for the weaver in utilizingdamaged bobbins.

With these and other objects in View, as will hereinafter appear morefully, the invention consists in the novel construction and arrangementoi' parts hereinafter described, illustrated in the accompanyingdrawings, and particularly pointed out in the appended claims, it beingunderstood that various changes in the form, proportions, size, andminor details of the structure may be made without departing' from thespirit or sacrilicing any of the advantages of the invention.

In the accompanying` drawings, Figure l is a longitudinal sectionalelevation of a bobbin constructed in accordance with the invention,illustrating' the same as mounted on a shuttlespindle. Fig. 2 is adetail perspective view oi' the bobbin attachment. Fig. 3 is a sectionalview of the end portion ol a bobbin, illustrating the applicationthereto of an attachment oit' slightly-modified construction. Fig. et isa similar view illustrating a :further modiiication.

Similar' numerals of reference are employed to indicate correspondingparts throughout the several ligures of the drawings.

In the drawings, l indicates a wooden bobbin of the ordinaryconstruction, and 2 a shuttle spindle or skewer ot the usual type, inthe present instance split to Jform two arms 4 and 5 of dilierentlength, the longer arm having an enlarged head, thus forming a catch forengaging the end of the bobbin. From constant use on spindles of thisclass and rough handling before and after the spinning' operations thebobbins are often broken and cracked, especially near their outer ends,where the thread runs olf tothe eye of the shuttle. .'Vhen thus injured,the thread is very likely to catch in the cracks and break, resulting inloss to both weaver and his employer.

In carrying out my invention 1 employ an attachment for the end of thebohbin, said attachment beingI in the form oit a metallic cappiece thatnot only strengthens and protects the bobbin, but forms a smooth surface`for the passage of the thread. In the construction shown in Figs. 1 and2 the attachment comprises an inner bushing 7 and an outer ring 8, thetwo being connected by a iiange 9, that fits against the end portion ofthe bobbin, while the bushing and ring tit snugly against the inner andouter faces of the bobbin, the ring being' rounded in order to form aperfectly smooth surface for engagement by the thread. rlhe bushing ispreferably ol such length as to extend inward into contact with theshorter arm of the spindle; but this in all cases will not be absolutelynecessary. The flange forms a Vseating-surface for the head or catch ofthe spindle, and being formed of metal or other hard material is notlikely to become worn or broken during the insertion of the bobbin intothe shuttle or its removal therefrom.

In some cases the construction may be modified by dispensing with theouter ring and allowing the periphery of the anged portion to form acontact-surface for the thread, as shown in Fig. 3, or the bushing maybe shortened or wholly dispensed with and the ring and flange retained,as shown in Fig. 4C. In all cases, however, the thread is held away fromthe cracks of the bobbin, and the loss from accidental breakage of thethread at this point is prevented.

It will be observed that the diameter of the cap-piece is greater thanthe diameter of the end of the bobbin, so that when placed thereon thethread 0r yarn will not be in frictional contact with the periphery ofthe bobbin to any great extent, but held some distance beyond theperiphery, as indicated in Fig. l, and will be guided over the smoothouter surface of the cap-piece, so that there will be little or nodanger of the thread breaking from undue pressure. The cap-piece 30 isheld in place by the usual catch formed at the end of the support, sothat it cannot be pulled off by the friction of the thread against it.

By providing a bobbin with a terminal annular ange or enlargement at apoint where the thread leads from the shuttle the thread will be heldfrom contact with the bobbin, and thus to a considerable extent reducethe friction and tension 0n the thread as it is unwound from the bobbin,especially during unwinding of the inner layers of the thread or yarn.

The attachment constitutes part of the equipment of the weaver and iscarried by him, each attachment costing but a very small sum and beingcapable of use for an indefinite period and on a practically indefinitenumber of bobbins, as distinguished from bobbins in which metal endpieces form an integral part of the structure of the bobbin and whichincrease the cost of the production of the bobbins to a veryconsiderable extent. The device is of especial value for the workman,inasmuch as he may avoid broken threads, and the subsequent stoppage ofthe loom and loss of time involved in tying the ends and in resultantimperfections, for which the weaver is usually fined. When brokenbobbins are found by the weaver, it is merely necessary for him to placethe attachment on the end of the bobbin, and this may be accomplishedwithout any loss of time, and the thread will then run as freely asthough the bobbin were perfect.

Having thus described the invention, what is claimed is- A detachablecap-piece comprising a cylindrical portion adapted to fit lwithin theend of a bobbin, said cylindrical portion having a liange at its outerend which is bent at right angles to lie parallel with the cylindricalp0rtion and thereby inclose the end of the bobbin, the diameter of thecap piece being greater than that of the end of the bobbin, therebyforming a guide for holding the thread out of contact with said bobbin.

In testimony that I claim the foregoing as my ownI have hereto afHXed mysignature in the presence of two witnesses.

FRANCIS CLARK.

IVitnesses:

ALLEN DIXON, ARTHUR CLARK.

